Radio frequency signal transceiving and processing method, device, and base station system

1. A radio remote unit (RRU), comprising: a digital circuit; a backplane; and at least one radio frequency signal transceiver configured to transmit an analog signal to the digital circuit via the backplane, wherein the radio frequency signal transceiver comprises; a pre-distortion circuit; and a transmission circuit coupled to the pre-distortion circuit and configured to: perform power amplification on an input first analog signal; wirelessly transmit the first analog signal after power amplification; and output the first analog signal after power amplification to the pre distortion circuit, wherein the pre-distortion circuit is configured to: convert the first analog signal after power amplification output by the transmission circuit into a second analog signal; and output the second analog signal, wherein the second analog signal is used to feedback distortion of the first analog signal to compensate the first analog signal in advance according to the distortion; and a receiving circuit configured to: wirelessly receive a third analog signal; process the third analog signal; and output the processed third analog signal, wherein the digital circuit is coupled to the at least one radio frequency signal transceiver and is configured to; convert at least one input first digital signal into a corresponding number of fourth analog signals; and output the corresponding number of fourth analog signals to a corresponding number of radio frequency signal transceivers; convert a fifth analog signal output by at least one radio frequency signal transceiver into a corresponding number of second digital signals; output the corresponding number of second digital signals, wherein the fifth analog signal is used to feedback distortion of one of the fourth analog signals to compensate the one fourth analog signal in advance according to the distortion; convert a processed sixth analog signal output by at least one radio frequency signal transceiver into a corresponding number of third digital signals; and output the corresponding number of third digital signals, wherein the one fourth analog signal is the same as the first analog signal, wherein the second analog signal is the same as the fifth analog signal, and wherein the third analog signal is the same as the sixth analog signal.

2. The RRU according to claim 1 , wherein the digital circuit comprises a common public radio interface (CPRI) and a digital-analog converter (DAC), wherein the CPRI is connected to input ends of N DACs, wherein output ends of the N DACs are separately connected to input ends of transmission circuits in N radio frequency signal transceivers, and wherein N is an integer.

3. The RRU according to claim 1 , wherein the digital circuit comprises a common public radio interface (CPRI), a digital-analog converter (DAC), a first up-frequency conversion circuit, and a first local oscillator (LO), wherein the CPRI is connected to input ends of N DACs, wherein output ends of the N DACs are separately connected to input ends of N first up-frequency conversion circuits, wherein local oscillation input ends of the N first up-frequency conversion circuits are connected to a local oscillation output end of the first LO, wherein output ends of the N first up-frequency conversion circuits are separately connected to input ends of transmission circuits in N radio frequency signal transceivers, wherein N is an integer.

4. The RRU according to claim 1 , wherein the digital circuit comprises a common public radio interface (CPRI), a digital-analog converter (DAC), and a first combiner, wherein the CPRI is connected to input ends of M DACs, wherein output ends of the M DACs are connected to M input ends of the first combiner, wherein N output ends of the first combiner are separately connected to input ends of transmission circuits in N radio frequency signal transceivers, wherein M and N are integers, and wherein M<N.

5. The RRU according to claim 1 , wherein the digital circuit comprises a common public radio interface (CPRI), a digital-analog converter (DAC), a first combiner, a first up-frequency conversion circuit, and a first local oscillator (LO), wherein the CPRI is connected to input ends of M DACs, wherein output ends of the M DACs are separately connected to input ends of M first up-frequency conversion circuits, wherein local oscillation input ends of the M first up-frequency conversion circuits are connected to a local oscillation output end of the first LO, wherein output ends of the M first up-frequency conversion circuits are separately connected to M input ends of the first combiner, wherein N output ends of the first combiner are separately connected to input ends of transmission circuits N radio frequency signal transceivers, wherein M and N are integers, and wherein M<N.

6. The RRU according to claim 1 , wherein the digital circuit comprises a digital pre-distortion (DPD) interface and a first analog-digital converter (ADC), wherein the DPD interface is connected to output ends of N first ADCs, wherein input ends of the N first ADCs are separately connected to output ends of pre-distortion circuits in N radio frequency signal transceivers, and wherein N is an integer.

7. The RRU according to claim 1 , wherein the digital circuit comprises a digital pre-distortion (DPD) interface, a first analog-digital converter (ADC), a second up-frequency conversion circuit, and a first local oscillator (LO), wherein the DPD interface is connected to output ends of N first ADCs, wherein input ends of the N first ADCs are separately connected to output ends of N second up-frequency conversion circuits, wherein local oscillation input ends of the N second up-frequency conversion circuits are connected to a local oscillation output end of the first LO, wherein input ends of the N second up-frequency conversion circuits are separately connected to output ends of pre-distortion circuits in N radio frequency signal transceivers, and wherein N is an integer.

8. The RRU according to claim 1 , wherein the digital circuit comprises a digital pre-distortion (DPD) interface, a first analog-digital converter (ADC), and a second combiner, wherein the DPD interface is connected to output ends of J first ADCs, wherein input ends of the J first ADCs are connected to J output ends of the second combiner, and wherein N input ends of the second combiner are separately connected to output ends of pre-distortion circuits in N radio frequency signal transceivers, wherein J and N are integers, and wherein J<N.

9. The RRU according to claim 1 , wherein the digital circuit comprises a digital pre-distortion (DPD) interface, a first analog-digital converter (ADC), a second combiner, a second up-frequency conversion circuit, and a first local oscillator (LO), wherein the DPD interface is connected to output ends of J first ADCs, wherein input ends of the J first ADCs are separately connected to output ends of J second up-frequency conversion circuits, wherein local oscillation input ends of the J second up-frequency conversion circuits are connected to a local oscillation output end of the first LO, wherein input ends of the J second up-frequency conversion circuits are separately connected to J output ends of the second combiner, and wherein N input ends of the second combiner are separately connected to output ends of pre-distortion circuits in N radio frequency signal transceivers, wherein J and N are integers, and wherein J<N.

10. The RRU according to claim 1 , wherein the digital circuit comprises a digital pre-distortion (DPD) interface, a first analog-digital converter (ADC), and a switch, wherein the DPD interface is connected to an output end of the first ADC, wherein an input end of the first ADC is connected to an output end of the switch, wherein N input ends of the switch are separately connected to output ends of pre-distortion circuits in N radio frequency signal transceivers, and wherein N is an integer.

11. The RRU according to claim 1 , wherein the digital circuit comprises a digital pre-distortion (DPD) interface, a first analog-digital converter (ADC), a switch, a second up-frequency conversion circuit, and a first local oscillator (LO), wherein the DPD interface is connected to an output end of the first ADC, wherein an input end of the first ADC is connected to an output end of the second up-frequency conversion circuit, wherein a local oscillation input end of the second up-frequency conversion circuit is connected to a local oscillation output end of the first LO, wherein an input end of the second up-frequency conversion circuit is connected to an output end of the switch, wherein N input ends of the switch are separately connected to output ends of pre-distortion circuits in N radio frequency signal transceivers, and wherein N is an integer.

12. The RRU according to claim 1 , wherein the digital circuit comprises a common public radio interface (CPRI) and a second analog-digital converter (ADC), wherein the CPRI is connected to output ends of N second ADCs, and wherein input ends of the N second ADCs are separately connected to output ends of receiving circuits in N radio frequency signal transceivers, and wherein N is an integer.

13. The RRU according to claim 1 , wherein the digital circuit comprises a common public radio interface (CPRI), a second analog-digital converter (ADC), a do frequency conversion circuit, and a second local oscillator (LO), wherein the CPRI is connected to output ends of N second ADCs, wherein input ends of the N second ADCs are separately connected to output ends of N down-frequency conversion circuits, wherein local oscillation input ends of the N down-frequency conversion circuits are connected to a local oscillation output end of the second LO, wherein input ends of the N down-frequency conversion circuits are separately connected to output ends of receiving circuits in N radio frequency signal transceivers, and wherein N is an integer.

14. The RRU according to claim 1 , wherein the digital circuit comprises a common public radio interface (CPRI), a second analog-digital converter (ADC), and a third combiner, wherein the CPRI is connected to output ends of K second ADCs, wherein input ends of the K second ADCs are connected to K output ends of the third combiner, wherein N input ends of the third combiner are separately connected to output ends of receiving circuits in N radio frequency signal transceivers, wherein K and N are integers, and wherein K<N.

15. The RRU according to claim 1 , wherein the digital circuit comprises a common public radio interface (CPRI), a second analog-digital converter (ADC), a third combiner, a down-frequency conversion circuit, and a second local oscillator (LO), wherein the CPRI is connected to output ends of K second ADCs, wherein input ends of the K second ADCs are separately connected to output ends of K down-frequency conversion circuits, wherein local oscillation input ends of the K down-frequency conversion circuits are connected to a local oscillation output end of the second LO, wherein input ends of the K down-frequency conversion circuits are separately connected to K output ends of the third combiner, wherein N input ends of the third combiner are separately connected to output ends of receiving circuits in N radio frequency signal transceivers, wherein K and N are integers, and wherein K<N.

16. A base station system comprising: a radio remote unit (RRU), comprising: a digital circuit; a backplane; and at least one radio frequency signal transceiver configured to transmit an analog signal to the digital circuit via the backplane, wherein the radio frequency signal transceiver comprises: a pre-distortion circuit; and a transmission circuit coupled to the pre-distortion circuit and configured to: perform power amplification on an input first analog signal; wirelessly transmit the first analog signal after power amplification; and output the first analog signal after power amplification to the pre-distortion circuit; wherein the pre-distortion circuit is configured to: convert the first analog signal after power amplification output by the transmission circuit into a second analog signal; and output the second analog signal, wherein the second analog signal is used to feedback distortion of the first analog signal to compensate the first analog signal in advance according to the distortion; and a receiving circuit configured to: wirelessly receive a third analog signal; process the third analog signal; and output the processed third analog signal, wherein the digital circuit is coupled to the at least one radio frequency signal transceiver and is configured to: convert at least one input first digital signal into a corresponding number of fourth analog signals; and output the corresponding number of fourth analog signals to a corresponding number of radio frequency signal transceivers; convert a fifth analog signal output by at least one radio frequency signal transceiver into a corresponding number of second digital signals; output the corresponding number of second digital signals, wherein the fifth analog signal is used to feedback distortion of one of the fourth analog signals to compensate the one fourth analog signal in advance according to the distortion; convert a processed sixth analog signal output by at least one radio frequency signal transceiver into a corresponding number of third digital signals; and output the corresponding number of third digital signals; and a baseband unit (BBU) coupled to the RRU and configured to: output at least one first digital signal to the RRU so that the RRU converts the first digital signal into a first analog signal and wirelessly transmits the first analog signal; receive at least one second digital signal output by the RRU, wherein the second digital signal is obtained after the RRU converts the first analog signal and is used to feedback distortion of the first analog signal to compensate the first analog signal in advance according to the distortion; and receive at least one third digital signal output by the RRU, wherein the third digital signal is obtained after the RRU converts a wirelessly received third analog signal, wherein the one fourth analog signal is the same as the first analog signal, wherein the second analog signal is the same as the fifth analog signal, wherein the third analog signal is the same as the sixth analog signal.

17. A radio remote unit (RRU), comprising: a digital circuit; a backplane; and at least one radio frequency signal transceiver configured to transmit an analog signal to the digital circuit via the backplane, wherein the radio frequency signal transceiver comprises: a pre-distortion circuit; and a transmission circuit coupled to the pre-distortion circuit and configured to: perform power amplification on an input first analog signal: wirelessly transmit the first analog signal after power amplification; and output the first analog signal after power amplification to the pre-distortion circuit, wherein the pre-distortion is configured to: convert the first analog signal after power amplification output by the transmission circuit into a second analog signal; and output the second analog signal, wherein the second analog signal is used to feedback distortion of the first analog signal to compensate the first analog signal in advance according to the distortion; and a receiving circuit configured to: wirelessly receive a third analog signal; process e third analog signal; and output the processed third analog signal, wherein the digital circuit is coupled to the at least one radio frequency signal transceiver and is configured to: convert at least one input first digital signal into a corresponding number of fourth analog signals; and output the corresponding number of fourth analog signal to a corresponding number of radio frequency signal transceivers; convert a fifth analog signal output by at least one radio frequency signal transceiver into a corresponding number of second digital signals; output the corresponding number of second digital signals, wherein the fifth analog signal is used to feedback distortion of one of the fourth analog signals to compensate the one fourth analog signal in advance according to the distortion; convert a processed sixth analog signal output by at least one radio frequency signal transceiver into a corresponding number of third digital signals; and output the corresponding number of third digital signals; and wherein the one fourth analog signal is processed to generate the first analog signal, wherein the second analog signal is processed to generate the fifth analog signal, and wherein the third analog signal is processed to generate the sixth analog signal.